Pharmaceutical composition for treating alcoholism, drug addiction and chemical abuse with improved naltrexone release profile

FIELD: medicine, pharmaceutics. SUBSTANCE: invention refers to medicine and pharmacy, namely addictology and may be used for treating human addiction to alcohol, drugs and toxic substances. An intramuscularly injected prolonged-release pharmaceutical composition contains naltrexone as an active substance. Additionally, the composition contains a pharmaceutically acceptable solvent and excipients differing by the fact that the active substance is included in first and second microsphere fractions of polylactide coglycolide. The first microsphere fraction is characterized by the relation of lactide and glycolide monomer links 50 mole %:50 mole % and microsphere size 0.4 to 7 mcm. The second microsphere fraction is characterized by the relation of lactide and glycolide monomer links 75 mole %:25 mole % and microsphere size 20 to 90 mcm. A weight ratio of the first fraction of 0.01 to 0.15, while a weight ratio of the second fraction is 0.99 to 0.85. EFFECT: preparing the composition for treating human addition to alcohol, drugs and toxic substances. 3 cl, 1 tbl, 9 ex